/* roulang page: index */
:root {
      --primary: #0D5C4D;
      --primary-dark: #083D33;
      --accent: #10B981;
      --accent-neon: #00E599;
      --dark-surface: #0F172A;
      --light-bg: #F8FAFC;
      --border-color: #E2E8F0;
      --text-main: #1E293B;
      --text-muted: #64748B;
    }

    * {
      box-sizing: border-box;
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--light-bg);
      line-height: 1.65;
    }

    /* 卡片微发光与投影规范 */
    .card-clean {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-clean:hover {
      box-shadow: 0 12px 30px -4px rgba(13, 92, 77, 0.12);
      border-color: #CBD5E1;
      transform: translateY(-2px);
    }

    .card-dark {
      background: #1E293B;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    }

    /* 按钮与交互徽章 */
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      transition: all 0.25s ease;
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 4px 14px rgba(13, 92, 77, 0.35);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
      transition: all 0.25s ease;
    }
    .btn-accent:hover {
      background-color: #059669;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
    }

    /* 叠层卡片舞台样式 */
    .hero-stage {
      position: relative;
      perspective: 1000px;
    }
    .hero-main-card {
      position: relative;
      z-index: 20;
      transform: translateZ(20px);
    }
    .hero-side-card-left {
      position: absolute;
      top: 8%;
      left: -8%;
      width: 65%;
      z-index: 10;
      opacity: 0.95;
      transform: rotate(-3deg);
    }
    .hero-side-card-right {
      position: absolute;
      bottom: -6%;
      right: -6%;
      width: 68%;
      z-index: 25;
      transform: rotate(2deg);
    }
    @media (max-width: 1024px) {
      .hero-side-card-left, .hero-side-card-right {
        position: static;
        width: 100%;
        transform: none;
        margin-top: 1rem;
      }
    }